Machine tool with motor-driven rotary and axially fed tools



Dec. 16, 1952 J, E, TOMPKlNs 2,621,686

MACHINE TOOL WITH MOTOR-DRIVEN I ROTARY AND AXIALLY FED TOOLS Filed Dec.l1, 1946 13 Sheets-Sheet l INVENToR.

Jan frere/74e 7Zm/f//ff BY /f/M? C ATTQFNEY Dec. 16, 1952 .1. E.ToMPKlNs 2,621,686

MACHINE TOOL WITH MOTOR-DRIVEN ROTARY AND AXIALLY FEID TOOLS Filed Dec.1l, 1946 13 Sheets-Sheet 2 20E l u A T TORNEY Dec. 16, 1952 J. E.ToMPKlNs 2,621,686

MACHINE Tool. WITH MOTOR-DRIVEN ROTARY AND AXIALLY FEDATOOLS FledDec.11, 1946 13 Sheets-Sheet 5 ATTOINEY Dec. 16, 1952- A .1. E. ToMPKlNs v2,621,686

MACHINE TOOL WITH MOTOR-DRIVEN ROTARY AND AXIALLY FED TOOLS Filed Dec.ll, 1946 15 Sheets-Sheet 4 IIA "lll/Ill Q y 5 INVENTOR.

A TTORNEY Dec- 16, 1952 J. E. ToMPKlNs 2,621,686

. MACHINE TOOL WITH MOTOR-DRIVEN ROTARY AND AXIALLY FED TOOLS Filed Dec.11, 194s 1s sneets-shee't 5 INVENTOR. da/7 frreye '75m/#M75 A TTORNE'YDec. 16, 1952 .l E. ToMPKlNs 2,621,686

MACHINE :IOOL WITH MOTOR-DRIVEN ROTARY AND AXIALLY FED TOOLS I FiledDec. 11, 1946 1,3 Sheets-Sheet 6 ATTORNEY Dec. 16, 1952 J. E. ToMPKlNs2,621,686

A MACHINE TOOL WITH MoToR-DRrvEN ROTARY AND AXIALLY FED TooLs Filed Dec.1l, 1946 15 Sheets-Sheet 7 Dec. 16, 1952 Filed D90. 11.4 1946 J. E.TCMPKINS MACHINE TOOL WITH MOTOR-DRIVEN ROTARY AND AXIALLY FED TOOLS 13Sheets-Sheet 8 A (9g 'r b4/b E re fle/7e 'Tango/fh s A TTORNE'Y.'

Dec. 16, 1952 J. E. 'roMPKlNS 2,621,686

MACHINE TOOL WITH MOTOR-DRIVEN ROTARY AND AXIALLY FED TooLs Filed Dec.11, 1946 13 Sheets-Sheet 9 INVENTO. 33 l0/m' refe/7 'Tomy/M5 Z7?HTTDf/VEY i Dec. 16, 1952 J. E. 'roMPKlNs 2,621,686

. MACHINE T001` WITH MOTOR-DRIVEN ROTARY AND AXIALLY FED TOOLS FiledDec. l1, 1946 13 Sheets-Sheet l0 IN V EN TOR.

Dec. 16, 1952 J. E. 'roMPKlNs 2,621,686

MACHINE TOOL WITH MOTOR-DRIVEN ROTARY AND AXIALLY FED TOOLS Filed Dec.ll, 1946 13 Sheets-Sheet 1l Dec. 16, 1952 J. E. TOMPKINS MACHINE: Tool,WITH MOTOR-Damm ROTARY AND AXIALLY FED TOOLS 115 Sheets-Sheet 12 FiledDSC'. ll, 1946 Y INVENroR. t

W n@ /f W/ M 5% MB M Dec. 16, 1952 J. E. 'roMPKlNs 2,621,686 MACHINErrom. WITH MOTOR-DRIVEN ROTARY AND AXIALLY FED TOOLS Filed D60. ll, 194613 Sheets-Sheet 13 IN V EN TOR.

Jam/Sfera@ 727/5 /f/f BY //ff Patented Dec. 16, 1952 UNITED STATESPATENT OFFICE MACHINE TOOL WITH MOTOR-DRIVEN ROTARY AND AXIALLY FEDTOOLS .lohn Everette Tompkins, Cleveland, Ohio, assignor, by mesneassignments, of thirty onehundredths to Ralph R. Roemer, thirty-fiveone-hundredths to Louise E. Roemer, twentyfive one-hundredths to WilliamR. Kiefer, and ten one-hundredths to J. Everette Tompkins, all ofCleveland, Ohio Application December 11, 1946, SerialNo. 715,442

8 Claims.

a rotary,. axially movable, tool driving spindlel mounted on the motorhousing and driven by the motor shaft through a transmission. A machinestructure supports the motor housing over a Work'table on which Work isplaced, and the machine structure comprises means for variably angularlypositioning the motor housing to correspondingly position the tooldriving motor shaft and the tool driving spindle, with respect to theWork; and comprises guide means to guide manual movement of the motorhousing to correspondingly guide movement of the tools. y'

To movably and adjustably support the motor housing as referred toI'prefer to employ a machine structure of the type illustrated anddescribed in the co-pending patent application of Carl F. Duerr, SerialNumber 641,980, filed January 18, 1946, assigned to the assigneeshereof. That machine has a motor housing bodily reciprocable manuallyalong a trackway, which Vis supported by an arm overhanging a Worktable. The trackway is pivoted on the arm on a vertical axis formovement in a horizontal plane to different angular positions on thearm; and the axis of the pivot is movable along the armV to differentpositions. The arm can be raised and lowered. The motor and its shaft,can be rocked to different angular positions on a trunnion axis at rightangles to the shaft.

The Work table has a fence against which Work may be placed, or alongwhich it may be guidedly moved;

In utilizing a machine structure of this type I detachably mount uponthe motor housing a spindle'unit-housing comprising a tool spindlemanually reciprocable axially, and rotatably driven by a transmissionfrom the motor shaft, the rotary axis ofthe spindle being substantiallyparallel to themotor shaft axis.

By this means as a Whole, rotarystools such as circular saws, routers,profilers, etc. may be,

mounted on the motor shaft and rotary tools such as drills,l reamers,profilers, sanders, planers, etc. may be mounted on the rotary spindle;

2 and the tools in either case may be positioned and guidedly moved toperform a great variety of operations.

For example, when a circular saw is the tool, it can make'cross cuts,bevel cuts, mitre cuts, rip cuts and combinations of the same; and whenspindle driven tools are used they can perform drilling, reaming,profiling, routing, surface sanding, surface planing operations, etc.,and three operations can be performed in all angular directions onhorizontal, vertical, or angular surfaces of the Work.

The invention is applicable to factory producl tion Work; and also hasalarge field of usefulness in the home work shops. Practically everyordi-v nary Woodworking operation can be performed by the machine withthe possible exception of lathe turning operations, on Work supported oncenters.

In one aspect of the invention it is an im-v proved motor poweredmachine tool, provided with means for mounting tools in two differentplaces on the motor; in one case the tool being a rotary tool, drivendirectly by the motor shaft, and in the other case, the tool being arotaryand-axially-movable tool, driven by the motor shaft through apower transmission; and the machine being provided With means tovariably position the tools and to variably guide movement thereof, inboth cases.

In another aspect of the invention, it is an improved machine toolhavingy annivers'ally positionable and guidedlymovable motor housing;and provided with means to mount rotary tools to be driven by the motorshaft directly, and correspondingly positionable and movable with themotor housing; and provided with means to mountrotary-and-axially-reciprocable tools on the motor housing to be drivenby the motor, and correspondingly positionable and movable With themotor housing.

In another aspect the invention is an improved motor driven machine toolcomprising -a tool spindle unit, having a rotary andaxially-reciprocable tool spindle, and constructed to be readily mountedupon the housing of the motor and driven by the motor, or detachedtherefrom; and the housing of the motor being supported on the machinefor universal positioning thereon and for universal guided manualmovement thereon, to correspondingly position and guide tools on thetool spindle.

In another aspect the invention is an improved construction of toolspindle unit,v comprising a rotary and axially movable tool spindle, andcono structed to adapt it to be readily mounted on the housing of amotor and to be driven by the motor.

In prior practice, rotary and axially fed tools are exemplified by theconventional drill press. It comprises a power-rotated drill-carryingspindle, which may be fed axially to feed the drill into the work on awork table; and in some cases the axis` of the drill spindle may be setvertically or horizontally or at intermediate angles; and in othercases, as in so-called radial drills,l the drill spindle can be variablypositioned along an overhanging horizontal radial arm, and the` armswung from side to side to variably position it over a work table.

The machine of the present invention, while having the advantage amongothers of being able to perform ordinary drilling and like operations.including all of those of the above mentioned type of radial drillpress, can perform drilling operations not possible with any prior drillpress machine of which I have knowledge among which are: the drilling ofa row of holes along a line in any angular direction in a work. piece onthe work table, merely by shifting the spindle drivingV motorto-diflerent positions along the aforesaid trackway after setting thetrackway to the appropriate angle; and `the drilling of another row ofholes parallel thereto, or spaced therefrom at an angle, after shiftingthe trackway axis along the arm; and the drilling of rows of holes in a.common horizontal plane and in any direction by angularly positioningthe `trackway and positioning the motoralong the trackway; and thedrilling of other rows of holes in a common plane parallel to theaforesaid plane by raising and lowering the arm.

To drill such rows of holes, even with radial drill presses having allof the conventional adjustments such as identified above for such drillpresses, the centers of the holes must rst be laid out on the work; andthen by a combination of successive or concurrent adjusting movements ofthe drill along the radial a-rm and of the swing of thev arm (each ofwhich adjustments changes the position of the drill effected by theother), the drill must be adjusted to bring it over each of the laid-outcenters, one at a time, and with different multiple concurrentadjustments for each hole.

Again, in prior practice, rotary surfacing tools have been usedvr forsanding or planing surfaces, and comprising cutting elements rotating ina plane at right angles to the rotary axis of the tool. Insuch practice,a large surface area can only besurfaced by a correspondingly largediameter tool calling for a, machine made especially forl thisoperation. With the machine of the present invention, a surface severalsquare feet in area may all be reduced to a perfectly smooth plane by arotary planar faced tool of only two or three inches in diameter. Thetool is put on the tool spindle on the motor housing as aforesaid, andfed axially to a cutting position on the work; and then by means of theuniversal movement provided for the motor housing, the tool can be movedover a great area, work-ing all of it to the plane of the tool face.

Again, in prior practice, a complete machine has been required to driverotary tools, fand another `complete machine has been required to driverotary-and-axially-reciprocable tools, when the tools are to universallypositioned and moved with respect to the work. 'Ihe present inventionprovides a single machine by which both classes of tools may be drivenand universally positioned and moved; utilizing a single driving motorand a single tool positioning and tool guiding mechamsm.

The actual invention, as to subject matter and scope, is set forth inthe appended claims according te law; and the main object thereof is toprovide a machine having features of construction and modes of operationsome of which are referred to above.

Other objects will be apparent to those skilled in the art to which theinvention appertains.

The invention is fully disclosed in the following description takeninconnection with the accompanying drawing, i n= which:

Fig. ll is a side -elevational view of a machine toolV embodying theinvention with parts broken away andV parts in section;

Fig.'2 is a front elevational view of the machine of Fig. 1, with partsbroken away;

Fig.. 3 is a fragmentary elevational view taken in the direction of thearrow 3 of Fig. l, showing a motor trunnion axis adjustment and withparts that would appear on the left side of the figure omitted forsimplicity;

Fig. 4 is a fragmentary elevational view taken in the direction of thearrow 4 of Fig. 2, with parts broken away to simplify the drawing;

Fig. 5 is a -view to enlarged scale from the plane 5 of Fig. l. or fromthe plane 5 of Fig. 2 rotated through ninety degrees on the paper; andwith parts which would appear on the lower side of Fig. 5 omitted forsimplication; and the right hand yend of Fig. 5 may be considered asfrom the plane 5 5 of Fig.' 3;

Fig. 6 is a fragmentary view,l similar to a part `of the right hand endof Fig. 5, but taken on the lplane 6 6 of Fig. 3;

Fig. 7 is a viewv to enlarged scale, with parts broken away, of a partof Fig. 1;

Fig. 8 is a sectional view to enlarged scale from the plane 3-8 of Fig.1;

Fig. 9 is a sectional view from the plane 9-9 of Fig. 1;

Fig. 10 is a fragmentary view from the plane lil of Fig. 9;

Fig. 11 is a fragment-ary broken sectional view from the plane H of Fig.9;

Fig. 12 is a top plan view of one of the parts of Fig. 9 taken in thedirection of the arrow I2 vof Fig. 9, and showing said part separately;

Fig. 13 is a top plan viewv of one of the parts Iof Fig. 9, taken in thedirection of the arrow I3 of Fig. 9, and showing said part separately,but wil a gib and its adjustment associated there- W1 i Figs. 14 and l5are fragmentary sectional views from the planes |4--I4 and 15-15 lofFig. 13;

Fig. 16 is a top plan view of the work table top of the machine takenfrom the plane I6 of Fig. l, with parts of the machine in section;

Fig. 17 is a fragmentary view to enlarged scale from the plane Il-I 'Iof Fig. 16 showing a table top adjustment, the same being shown tosmaller scale in Fig. 1;

Fig. 18 is a view showing in plan a part of a tablebase and supportingcabinet top and showing a part of the cabinet in section, the view beingtaken from the plane |8|8-of Fig. 2;

Fig. 191s a view to enlarged scale from the plane I9 of Fig. 2, withparts in elevation and parts in section and other parts broken away; andwith some of the parts behind the section .plane omitted for simplicity;

Fig. 20 is an elevational view to enlarged scale from the plane20 ofFig. 19, orFig51 with parts broken away;

Fig. 21 is a sectional view, the lower part being Ataken from the plane2I2I of Fig. 19; and the right hand part being taken from the plane2I-'2I of Fig. 3, to a larger scale, to simplify the drawing;

Fig. 22 is a sectional view from the plane 2222 of Fig. 19;

Fig.r 23 is a fragmentary View to a larger scale from the plane 23-23 ofFig. 24;

Fig. 24 is a sectional view from the plane 24-24 Of Fig. v19;

:'Fig. 25 is a 'sectional view from the plane 25--25 of1iig.-l9;A f YFig. 26 is a fragmentary view of a part of Fig. 2, with parts thereofrotated through 90 and ywith parts replacing-some of the parts of Fig.2;

Fig12'7 is 'aperspective View illustrating a board or like work piecewhich may be laid on a Awork tablel of the machine and illustrating rowsof holes which may be drilled by a drill type tool of the machine; g

Fig. 28 is a View similar to Fig. 27 but with the surface of the workpiece vertically disposed;

Fig. 29 is a fragmentary view of a part of Fig. 1 illustrating a planingtype tool that may be used;

A Figs. 30 and 31 are somewhat diagrammatic views illustrating in plan awork pieceupon which a planing operation may be performed by the tool ofFig. 29, and the path of the tool;

Fig. 32 is a view similar to Fig. 29 but illustrating a sanding typetool.

As mentioned hereinbefore the invention provides for mountingrotary-and-axially-reciprocable tools on a motor housing (exemplified bya drill type tool), and driving the tool by the motor and universallypositioning and moving the housing, to position and move the tool; andprovides for mounting rotary tools (exemplified by a circular saw) onthe motor, and similarly positioning and moving it by positioning andmoving the housing.

In the following, the machine generally and the means by which the motorhousing is mounted for universal positioning and universal movement,will first be described, apart from either type of tooi (to render thedramng simpier than otherwise in some respects) and this will befollowed by a description for rotary-and-axiallymovable type tools(drills) and nally will fol low a description for tools ofthe simplerotary type (saws).

As shown in the elevational views, Figs. 1 and 2, the machine toolcomprises in general a cast metal main base I, mounted on the top of asheet metal support 2 having the form of a cabinet; a column 3 mountedon the base I; a stern 4 reciprocable vertically in the column 3; agenerally horizontal arm 5 on the stern 4; a pivot head 6 adjustablypositionable along the arm 5; a horizontal trackway 'I adjustablypivotable upon a vertical axis on the head`6; a carriage 8 operativelyreciprocable along the trackway 1; hangers 9 and 9A on the carriage 8,supporting a motor I0; and a work table I2 supported on the base I.

The constructional details of the parts referred to generally above,will now be described.

The main support 2 is generally rectangular in horizontal plane, andcomprises four corner t legsy I3I3 formed by bending sheet metal toprovide as at I4, Fig. 18, rounded external contours on the legs; thevertical inner edges of the legs'thus formed being bent inwardly toprovide nangesfflsJ-ls. sheet metal wans or panes le at bothv ends andboth sides of the support, are provided, having flanges I1 bolted to thefianges I5of the legs by bolts I8, Fig. 18. The panels I6 may terminatedownwardly as at I9 above the lowerV ends of the legs I3; and aninterior shelf 20, Fig. 2, may be provided and supported in any suitablemanner, whereby the interior of the support, enclosed by the legs andthe side walls, may be used as a cabinet to contain tools, material tobe worked, etc. To give access thereto a door 2l may be provided in oneor more of the panels, and attached thereto for opening and closing inany suitable manner not essential to the invention. f

'1"op plates 22-22, Figs. 1 and 18, are provided at the topsof the legsI3, and may be secured thereto by welding. Each of these plates isprovided with a perforation 23. v y i The base I, see Figs. 1, 2, and18, is generally in the form of a downwardly open shallow cup or panreinforced on its underside by ribs 24--24, andis generally rectangularin plan with rounded corners. In the corners are bosses 25which restupon the leg plates 22, and holes 26 are provided in the bosses, andbolts 21,'Fig. 1, are projected downwardly through the holes and throughthe perforations 23-23 in the leg top plates, with nuts on the boltsunder the plates. The base is thus bolted to and rests upon the top ofthe support.

On the top of thebase I at one end is a pad 28 provided with fourthreaded holes 29-29. As shown in Fig. 16, the column 3 has at its lowerend a flange 30 which rests upon the said pad,` see also Figs. 1 and 16,and bolts 3I are projected through the ange 30 and screwed into the saidthreaded holes 28 to rigidly mount the column on the base. The column 3is hollow or tubular as shown in Figs. 1, 16, and 8.

The aforesaid stem 4 is hollow or tubular, Figs.

1 and 8, and exteriorly is circular in cross section,

4and the upper end portion of the column 3 has a cylindrical bore 32therein in which the stem has a sliding t. The lower end of the tubularstem 4 is closed by a nut 33, Fig. 1, secured thereon by a pluralitysuch as three screws 34 one of whichv is shown in Fig. 1. An elevatingscrew 35 is meshed with the nut and extends upwardly therethrough intothe stem 4, and downwardly therefrom below the nutand means now to bedescribed is provided to turn the screw to cause it to react upon thebase I and raise or lower the stem -4 in the column 3, such means beingshown best in Fig, 7, although shown in simplified form to smaller scalein Fig. 1.

At the lower end of the screw 35 is a reduced diameter screw stemA 36providing a shoulder 38 on the screw. The stem 36 extends through a hole31 in the pad 28 of the base I, Figs. rland 18, and a ball thrustbearing 39 is provided between the shoulder 38 and the base I. A bevelgear 40 is keyed as at 4I to the stem 36, and a thrust ball bearing 42is provided between the gear and the A nut 43 threaded on the stem 36below the gear 40 and having a cotter key arrangement 44 to selectivelylock it in any adjustably rotated position, mounts the aforesaid partsin assembled relation on the base I, with lost motion in the thrustbearings 39 and 42 reduced to the minimum, land with the screw heldagainst lateral displacement by the stem 36 in the bore 31, butrotatable by the gear 40, and with the thrust bearings anti-frictionallytaking up the thrust of the screw 35 and transmitting it to the base I.

A bevel gear 45 is meshed with the bevel gear 48, keyed or pinned to ashaft 46 rotatably supperted in a bearing 4l', mounted in a bracket 48secured upon the underside of the base l by screws 45 projected throughthe bracket and screwed into the base l, the threaded holes in the basefor the same being shown at Ell-50, Fig. 18, and indicated in Fig. 7.

The shaft d extends all the way to the front of the machine andoutwardly through a forward wall 5| of the base l, Figs. 1 and 7,wherein it has a rotary bearing 52, the outwardly projecting end of theshaft having a transverse pin 53 therein, whereby a crank handle 54 maybe detachably telescoped. on and clutched to the shaft 45 in the well'known manner illustrated, to rotate the shaft, and as will now beunderstood this will rotate the screw 35-to raise or lower the stem 4.

In order that the stem 4 may be rigidly locked to the column 3 after itsposition is in this manner adjustably changed, and in order that thestem 4 may be freed to be raised or lowered as described, the stem has alongitudinal wedgeform keyway in the rear side thereof, Figs. l and 8. Awedge 56 having an inner portion formed to wedgingly fit the keyway 55and a rearward portion reciprocable in a bore 51 in the column 3 isprovided, the outer open end of the bore 51 being threaded as at 58, anda stud 59 being screwed into the threads 58. Upon rotating the stud 59in one direction the wedge '5S is engaged with the keyway 55 to lock thestem 4 and column 3 rigidly together and to prevent rotation of the stem4 in the column out of a preselected position forfit; and upon rotatingthe stud in the other direction the engagement is loosened whereby thestem may be freely raised or lowered. To rotate the stud 59, a handleGil is mounted on the outer end of the stud.

The preferred way to mount the handle 5d on the stud 59 is to make thestud 59 of hard metal such as steel with longitudinal teeth or splines5I thereon, and to make the handle S9 of relatively soft metal such asaluminum with a smooth bore `therein embracing the splines, and with oneside of the bore slotted out or open as at G2, and with a screw 63 toclamp the soft metal bore upon the splines. (This construction is notillustrated in cross section for the handle EQ, but an identicallysimilar construction with the suffix A for the reference characters isshown in Fig. 11 for another part to which reference may here be made.)

The hard metal male splines fdl bite into the soft metal of :the handlemaking groove like indentations or female splines thereon. If due towear or due to any other cause requiring adjustment of the handlerotatively on the stud 59, the screw B3 is loosened and the handlerotated on the male splines until the .male splines again seat in thefemale splines made in the soft metal. By this method, intermeshing maleand female splines are provided respectively on the stud and on thehandle without the necessity of cutting accurate female splines bymachining operations in the handle. Also, the splines 6| need not be cutby a cutting tool but can be formed simply by knurling.

Preferably the handle t9 is bent around the column 3 to bring the endGil of the handle opposite the side of the column, as shown in Fig. 8.The operator to operate the wedge 5E for locking purposes may raise thehandle or strike it upwardly, and to unlock the wedge he may strike itdownwardly, and it `will then be stopped by 8 engagement with the sideof the column, as indicated in broken line at 64A as a convenient meansfor limiting the movement of the handle and for making it readilyaccessible and conveniently operable.

The arm 5 as plainly shown in the drawing, Figs. 1 and 9, is aninternally ribbed, downwardly open casting and at its rearward end hasan internally projecting flange 66 resting upon an externally projectingflange 65 on the top of the stem 4 and secured thereto by a plurality,such as three screws Si, one of which is shown in Fig. 1, projectedupwardly through the flange 65 and threaded into the flange 65. Thisrigidly joins the arm 5 to the stem 4 as a single unit, whereby the arm5 may be raised and lowered by the screw 35.

The arm 5 is formed to have an ornamental exterior contour and its outerend is closed by an ornament-al cap 68. Extending forwardly andrearwardly along the arm and on its opposite sides, are guides 59 and1U, Figsfl and 4, which are parallel and `which as shown in crosssection in Fig. 9 have upper horizontal planar surfaces 'H and 'l2respectively, and planar under surfaces 73 and 14, respectively,inclined downwardly and inwardly.

The aforesaid pivot carrying-head .6 of Figs. l and 4, shown separatelyin Fig. 13 and in cross section in Fig. 9, is mounted on the guides 59and 'lil to be adjustably slidably positionable therealong, and to belocked thereon in any adjusted position as follows.

A pair of caps 'l5 and 15, Figs. l, 4, and 9, are secured upon the upperside of the pivot carryinghead 6, by screws 'VI- 11, and overlap thehorizontal surfaces 'H and l2, and slidably engage the same, and supportthe weight of the pivot carrying-head 5 and its associated parts.

rlhe pivot carrying-head has an inclined surface or face 13 engaging andfitting the inclined surface lil of the guide 7U; and the inclinedsurface 73 of the guide 69 is similarly engaged by the pivot carryinghead, but through the 'agency of a gib F9 mounted thereon, shown insection in Figs, 9, 14, and 15 and longitudinally in plan in Fig. 13,this gib being mounted as follows.

A pair of spaced pins SEL- are press fitted into suitable drilled holesin the head 6 and the pins project loosely into holes 8| in the gib. Thegib has a planar surface 82 and is positioned at an inclination toengage the surface 32 with the said inclined surface '13. Behind the gibare two spaced screws 83 threaded through the head 6 and abutting attheir inner ends upon the back side of the gib 19 whereby the gib may bepropelled inwardly (or outwardly) to adjustably take up lost motionbetween the surface 82 and the said surface 13; and lock screws 84threaded into the same threads as the screws 83 may be screwed in toengage the screws 83 to l-ock them in adjusted positions.

By this means and with reference to Fig. 9, the gib 79 may be adjustablypositioned toward and from the guide 59 to take up lost motion andprovide a smooth sliding engagement between the caps l5 and 'I6 and thehorizontal surfaces 'il and l2, and between the surface 'I8 and thesurface 14, and between the gib itself and the surface '13.

Means is also provided to lock the pivot carrying head E in any adjustedposition along the guides 553 and 'iii and comprises, see Fig, 9, aplunger 35 behind the gib 'I9 reciprocable in a bore 85 in the pivotcarrier 6 and connected to a A:2,621,eee

.threaded stem 81 which is threaded into the outer end of the bore 86and provided with a handle 88 for turning the threaded stem. Thethreaded stem 81 has a rotary connection with a plunger 86 whereby theplunger 85 may be propelled in the bore without rotating therein uponturning the handle 88, and while this rotary connection may be variouslymade that shown in the drawing operates as follows. Upon screwing thestem 81 inwardly, its inner end engages the plunger 85 and propels itinwardly. Upon turning the stem 81 in the other direction, a shoulder 89associated with and connected to the plunger 85 engages a correspondingshoulder within the handle 168 to propel the plunger .85 outwardly.

When the plunger 85 Iis propelled inwardly by the handle 88 it engagesthe back side of the gib 19, and because the gib 19 is loosely mountedon the carrier 6 by the pin construction above described, particularlyin connection with Figs. 13

` and 15, the gib will be forced into locking engagement with the guide69 at the surface 13.

As will become clearer hereinafter, adjustably positioning the pivotcarrying head 6 along the guide 69 and 10, adjustably changes in generalthe working zone of the tool with respect to work on the work table I2.For some operations, the pivot carrier 6, after unlocking it from theguides k69 and 10 by the handle 88, may be shifted by hand, but i-nother instances it may be desired to adjustably position the pivotcarrying head 6 with a veryacourate or micrometer movement, and themeans for this isshown in Figs. 9 and 10 and indicated in some of theother figures.

To this end, a longitudinal rib 90 is provided on the inside of the arm5, and a toothed rack 9| is secured on the under side of the rib by aplurality of screws 92, projected through perforations in the rack andthreaded into threaded holes in the rib. A pinion 93 has its teethmeshed with the teeth of the rack, and is connected to a shaft '94rotatable in a bearing bore 95 in the carrier 6 and having a handle 96on the shaft for turning it. By turning the handle 96, the pinion 93 isrotated and propels the rack 9| and the pivot carrying head 6 on theguides 69 and 10 with micrometer movement. When the carrier is propelledby hand the pinion 93 and the handle 96 will be rotated idly. v

The trackway referred to generally Iat 1 is mounted on the pivotcarrying head 6 so as to be rotatably adjustable thereon about avertical axis, and may be locked thereon in any adjusted position andthe purpose of making the pivot carrier 6 adjustable along the arm 5 asdescribed, is to adjustably move this vertical pivot axis; and theconstruction of this pivot axis will now be described and reference maybe had to Figs. 1 and 9.

The trackway 1 is an elongated structure .as shown in Fig. 1 and to bedescribed, but at this point of the description, reference is made totwo risers 91-91 extending upwardly :from the upper side of the trackwayas a whole and at about the middle of the tr-ackway. Upon these risers91 is mounted a clamping disc 98 by means of screws 99-99, Fig. 9,projecting upwardly through the risers and screwed into the disc 98. InFig. 9, two of these screws are shown for one of the risers 91, and inFig; 12 wherein the disc 98 is shown separately, all four screws 99 forthe two risers are identied. It will be observed that there is anopening in the trackway 1 under the risers 91 to give access to thescrews 99.

` The clamping disc 98, shown separately in Fig.

l 12 and in section in Fig. 9 is in general circular.

and at its center a large diameter pivot pin I0| extends therethroughand is keyed thereto as at |02, so that the disc and the pin will rotatetogether. At its upper end portion the pin IDI has rotational bearing ina bushing |03 in or on the pivot head 6, Iand the pin extends upwardlybeyond the bushing, and is threaded as at |04, and a nut |05 on thethreads |04 rests upon the upper end of the bushing |03. The lower endof the pin |0| projects downwardly out of the disc 98, and is threadedas at |06, and has a clamping nut |01 on the threads. A laterallyextending rod |08 is threaded into the side of the nut |01 and on itsouter end has a handle |09 by which an operator can turn the nut |01,through part of a revolution, to loosen or tighten it.

The upper side of the nut |01 when screwed upwardly on the threads |06engagesa bearing or clamping washer ||9 between the nut |01 and the dise98. 1 y

By the construction thus far described, the weight of the trackway 1 andparts associated therewith to be described, is transmitted through therisers 91 and screen 99 to the disc 98, through the washer ||0 to thenut |01 and stem |6I and thence to the nut |05', and thence to thehead6; and when the nut |01 is loosened, the trackway 1 and disc 98 may berotated by hand, the pin |0| rotating in the bearing bushing |03, toangularly position the trackway 1; and when the nut |01 is tightened,the said parts are rigidly locked in their rotated positions byclampingly engaging the disc 98 with the head 6 above it. on mutuallyengagedrlarge diameter wedging surfaces of the disc |and head asfollows.

The angular throw of the handle |98 to tighten or loosen the nut |01 isadjustable by taking up endwise lost motion of the pin I 0| by the nut|05 on the top of the pin. The nut |05 is locked by being split as at326 on one side and a set screw 32| threaded into the side of the nut,to spread the slot, upon engagement of the inner `end thread of the setscrew, with the inner end of the corresponding thread in the nut.

On the upper side of the disc 98 at I|I is a frustoconical surface,which if extendedwould have an apex in the central axis of the pin |0I;and on the underside of the carrier 6 is a like surface ||2 coincidingwith the surface I, these surfaces being shown in Figs. 912, and 13. Itwill be observed in Fig. 9 that except for these engaging conicalsurfaces III and IIZ, the underside of the head 6 is out of contact withthe upper side of the disc 98. When as described, the nut |01 is turnedto screw it inwardly on the pin |0| and it engages the washer IIIl ofthe disc 98, it raises the disc 98 to wedgingly engage the conicalsurfaces II and |I2, and these, being on large diameters, rigidly clampthe rotary disc 98 to the non-rotating head 6in a manner torresistrotation of the disc 98 and the trackway 1 attached thereto, even if,because of the length of the trackway'1, great torque should be appliedthereto and to thedisc 98 in the direction to turn it. It is needless toadd that for obvious reasons, the pin I0| and the wedging surfaces IIIand I I2 are coaxial.

As to the construction of the trackway 1, it is in general an elongatedcasting, Figs. 1 and 9, having spaced side walls |I3-II4, on theopposite outer portions of which are ball bearing raceways, formed ofmetal rods ||5II5 (for the side wall H3) wedgingly seated in grooves `I|6--I I6 in vertically spaced apart parallel relation. Each of the rodsI5 is retained in its groove ||6 by a sheet metal strip Ioverlappinga-part only of the rod ||5, and mounted on the side wall ||3by screws H8.

Like rods ||9||9 are similarly provided on the side wall I4 and securedthereon in a similar manner.

These raceway rods are disposed so that the rods of each pair ||5| I5and ||9| I9 are parallel to each other, and so that the rods of one pairare parallel to the rods of the other pair.

AS to the carriage 8, it comprises two side portions |2|l and |2|extending upwardly opposite the trackway side walls ||3 and ||4, andspaced therefrom as shown in Fig. 9, and provided with short racewayrods |22|22 for the side portion |23, and IES-|23 for the side portion|2I, seated in grooves therein similar to those provided for thetrackway rods; and each carriage rod is held in a groove by a sheetmetal strip |24 overlapping a part only of the rod and secured on thecarriage by screws I 25.

The carriage 8 is supported on the trackway 'I by a series of bearingballs |25 between and engaging the raceway rods 22|| 5 and by a seriesof balls |21 between and engaging the raceway rods |23 and H9; and eachseries of balls is maintained in longitudinally spacedrelation by astrip-like cage construction |28 in which the balls are loosely trapped.

The carriage 8 may be reciprocatively propelled longitudinally along thetrackway, the raceway rods of the carriage rolling on the balls and theballs rolling on the raceway rods of the track* way. Preferably the cageconstruction |28 is prevented from dragging on adjacent parts with unduefriction by tongues |29 formed on the metal rod retainers and hookingover adjacent portions of the cage construction, as shown.

The aforesaid hangers 9 and 9A for supporting the motor ||l arepreferably cast integrally with the carriage 8 and depend therefrom.These hangers have upwardly open slits |39, Figs. 2, 3, and 9 at theirupper ends. This construction makes the upper ends of the hangers in twoseparate parts |3|-|32, and completely separates the side portions |23and |2| of the carriage. Bolts |33, Fig. 9 and Fig. 3, are projectedthrough one of the hanger portions |3| and threaded into the otherportion |32; and upon screwing these bolts in or out, the resilience ofthe cast metal hangers allows the upper portions |3| and |32 to be drawncloser together or to move farther apart, and this adjusts the positionsof the side portions |23 and |2I, whereby undue lost motion in the ballbearing trackway and carriage construction described above, may beremoved and the bearings adjusted. The bolt |33 at the upper end of onehanger arm 9 is shown in Fig. 9 and Fig. 1 and the other bolt |34 forthe other hanger arm is shown in Figs. 1 and 2. Either or both of thesebolts may be turned to adjust the parts of the ball bearing and racewayconstruction as described.

The ball bearing construction described permits the carriage 8 to bepropelled without friction along the trackway 1. Means is providedhowever to lock it against movement along the trackway. This meanscomprises, Fig. 9, a shaft |35 rotatable in a bearing bore |36 in oneside portion of the carriage 8, for example the side portion |26 asshown; and a handle 63A is mounted on the shaft |35 to turn it. IThebearing bore |33 has shoulders |38 and |39 at its opposite ends,

12 and the shaft |35 has an enlarged-diameter portion |53 abutting theshoulder |39.

The inner end of the shaft |35 is screw threaded into a gib having aninclined or wedging surface |42 engageable with a like wedging surface|53 extending along the trackway side wall H3. A spring is@ surroundsthe shaft |35 and abuts at one end upon the gib |l| and at the other endupon the shoulder |38.

The spring holds the shaft |35 toward the left as viewed in Fig. 9 withthe enlarged diameter portion |53 engaging the shoulder |39, the springreacting upon the shoulder |38 and the gib lill to this effect.

Upon rotating the shaft |35 by the handle 69A inv one direction, the gib|l| is propelled along the threads of the shaft, in the nature of atraveling nut, to disengage the said wedging surfaces M2 and |43 to freethe carriage 8; and when the handle is rotated in the other direction,the gib |f1|| travels along the threads to frictionally engage the saidwedging surfaces to lock the carriage against movement on the trackway.

The preferred means of mounting the handle 39A on the shaft portion |59is shown in Fig. ll, and will be understood from the description alreadygiven of a like means for attaching the handle 69 of Fig. 8 to the screw59.

The motor |3 is supported at the lower ends of the hangers 3 and 9A bytrunnion bearings by which the motor may be adjustably rocked around atrunnion axis at right angles to the rotational axis of the motor, andthis will now be described, reference being had to Figs. 1, 2, and 26and particularly Fig. 5.

On the left side of the motor |l as viewed in Fig. 5 is a large diametertrunnion |135 in the form of a cup. It is shown in one piece butoptionally its bottom may be a separate piece. The outer wall surface ofthe cup is cylindrical; and the lower end of the hanger 9A is enlargedinto a ring |63, having a cylindrical bore |53 in which the trunnion |65has rotary bearing. The ring is split on one side as at |41, andprovided with two lugs lli-i at each side of theslit, and a bolt |59having a handle |5| thereon for turning it, is projected through alignedbores in the lugs and into a nut |52, whereby the ring m6 may becontracted to grip the trunnion |l|5 or released so that the trunnioncan be turned therein.

It may be inserted here that the opposite trunnion bearing in the hanger9 is constructed to prevent endwise shifting of the motor I3 on thehangers, in a manner to be described in connection with Fig. 5, so thatthe trunnion is allowed to float axially in the bore |53 when freed asdescribed.

The cup form trunnion |45 is mounted upon the motor by any suitablemeans, that shown comprising a plurality of bolts |511 shown in Fig. 2one of which is shown in Fig. 5, projected through the bottom of the cupand on through the cup and screwed into the motor frame.

An operators handle 55 of U-form is mounted upon the cup trunnion |45 bybolts |55 projected through the cup bottom and screwed into the openends of the handle, and, as will be more fully referred to, the handlemay be used to reciprocate the motor and the carriage 3 along thetrackway l, in all rotated positions of the motor I3 on its trunnions.

The cup form trunnion |45 is made deeper axially than would be necessaryto give bearing in the hanger ring 43, so as to serve as a housing forelectrical connections and control apparatus vfurthe motor I0.. Electriccurrent-is `conducted rphase alternating current motor, the startinglcircuit of which comprises a condenser, and in such cases the condenser|6| may be mounted within the cup form trunnion and connected to themotor circuit by suitable wires as shown. Also, in some cases it may bedesired to provide an automatic current overload switch of the pushbutton reset type, and such a device is shown generally at |62 withinthe cup form trunnion, and with its reset push button |63projectingoutwardly through the cup bottom wall and accessible to thehand of the operator grasping the handle |55.

Various other types of electrical apparatus associated with the startingand stopping of the motor and adapted to different kinds of motors andstarting circuits may be mounted within the cup form trunnion as will beunderstood. The trunnion |45 thus performs a number of functions inaddition to its function as a trunnion bearing.

At the right hand side of the motor I0 as viewed in Fig. the trunnionbearing for the motor on the hanger 9 is as follows.

A mounting plate |64 is mounted upon the motor frame in any suitablemanner for example by a plurality of screws |65, and has an axiallydisposed threaded hole |66 therein. A L.

stud I61A is screwed into the hole |66, rigidly, by means of a shoulder|68A on the stud engaging the plate |64; and has an enlarged head I68 onits outer end and intermediately has a trunnion shaft portion |61.

The lower end of the hanger 9 is enlarged into a ring |69 and a bearingplate |10 is mounted on the ring by a plurality such as four screws I1|,Figs. 3, 5, and 6. The bearing plate |10 has a bearing bore |12 thereinin which the trunnion shaft |61 may rotate or oscillate, and at the endsof the bore |12 the material of the bearing plate, by engaging at oneend the plate |64 and by engaging at the other end the enlarged head|68, prevents axial shifting of the motor at this trunnion bearing.

It is desirable to be able to adjust the rotational axis of the motorwith respect to the plane of reciprocation of the carriage 8 along thetrackway in all pivoted positions of the trackway on its described pivotaxis, and to this end the trunnion axis on the hanger 9 is madeuniversally adjustable thereon by the following means shown best inFigs. 5 and 6.

The screws |1| which secure the bearing plate |10 to the ring |69 of thehanger 9 pass through holes |13 in the bearing plate |10 larger than thescrews. The bearing plate |10 has on its inner side a cylindrical rib|14. A plurality such as four, radial screws |15, see also Fig. 3, arethreaded radially through the ring |69 and with their inner endsabutting the rib |14. By rst loosening the screws |1|, one of the screws|15 may be backed out a fraction of a turnA and the diametricallyopposite screw.- I15;screwed in.

` correspondingly, which has the effect of shifting the trunnion shaft|61 with respect to the hanger 9. The screws I1| are then againtightened to fix the adjustment. As a further precaution to fix theadjustment, the threaded bores for the screws |15 may be longer axiallythan the screws themselves, but permitting a screw driver to enter thethreaded holes to turn the screws, and after the screws have beenadjusted, locking screws |16 may be screwed into the holes tightly uponthe outer ends of the screws |15 to lock them.

As to the work table I2, Figs. 1 and l16, it is made of wood and in twoparts havingr a common top plane 20|, a front part |11 and a rear part|18, and with a forward fence |19 therebetween; the fence beingremovably secured in position by wedges driven in between the fence andthe rear part |18. The two parts of the table are connected together byside cleats |8||8| and by plates |82 screwed upon the bottom of thetable parts; and the cleats and the plates support the fence |19 and thewedges |80 as will be clear from the drawing. A rear fence |83 is alsoprovided at the rear of the table, being screwed to the table part |18,and the two fences |19 and |83 are parallel.

By means best shown in Fig. 17 but also shown in Figs. 1 and 16, thetable I2 as a whole is mounted upon and secured to the cast metal baseby means which permits the table to be adjusted to level up its topplane surface or, in other words, to dispose or restore the top surfacein a plane parallel to the plane of reciprocatory movement of the motorand of a tool driven thereby in all angularlyadjusted positions of thetrackway.

To this end, a plurality such as four studs |84 are screwed into bosses|85 formed on the base I, and project above the base, and have wrenchreceiving heads |86 for turning them to screw them in and out. The upperends of the studs |84 are at or planar and the table I2 rests thereonand is supported thereby. The upper ends of the studs |84 are internallythreaded as at |81. Screws |88 are projected downwardly through thetable l2 and screwed into the threads' |81 of the studs, the heads ofthe screws |88 engaging the bottoms |89 of counterbored holes in thetable top, and the upper ends of the screws |88 are well below the topsurface of the table. The screws |88 when screwed down tight, clamp thetable I2 between the heads of the screws and the tops of the studs |84,and this clamping action on the studs |84 also locks themagainstrotation. To level up the top of the table as described, thescrews |88 or some of them lmay be loosened and the corresponding studs|84 turned to screw them in or out of the bosses |85, to lower or raisetheir upper ends, and then the screws |88 again tightened.

As indicated in Fig. 16, the heads of the screws |88 may have hexagonalrecesses |90 therein to receive an Allen wrench for turning them; and toturn the studs |84, an ordinary thin iiat wrench may be insertedlaterally between the top of the base and under side of the table I2 toengage the heads |86.

As mentioned, the motor may be adjustably rocked on its above describedtrunnion axis and secured in rocked position by the bolt |50 on thehanger 9A, and to indicate the angular rocked positions, a scale |9| isprovided on a strip of metal wrapped around a part of the trunnion |45,see Figs. 1 and 5; and secured thereon, and a

